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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

d7

Spindle Amplifier communication error

Fanuc · Series 30i/31i/32i-MODEL B Plus

What does d7 mean?

A communication error has occurred within an electronic device on the Spindle Amplifier control circuit. This suggests that the Spindle Amplifier control printed-circuit board may be loose, or the Spindle Amplifier unit itself is faulty. This error directly impacts the control functionality of the spindle.

Common Causes

  • Spindle Amplifier control printed-circuit board is loose
  • Spindle Amplifier is abnormal

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check whether the Spindle Amplifier control printed-circuit board is mounted correctly and all fasteners are secure.

  2. 2

    If the board is confirmed to be mounted correctly and securely, replace the Spindle Amplifier unit.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

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Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Open Manual (Page 127)Search more codes in this manual